new system reboots before desktop

[adc1986]

I just built a new system and after i installed the drivers for the video card it will not longer boot to windows(32bit version). Right after the windows boot up screen the hard drive powers down and the system reboots. The wierd thing is that it worked and booted up just fine like the second(not the first) day i built it and played on it for 3 hours playing some games. The next day(s) it wouldn't boot anymore.

I tried different drivers from the ati website but they did not help. I tested the cpu with prime95 for 10 hours and it was fine. I tested the ram with memtest86 for 11 hours and no errors. I tried a second(different model) motherboard and it did the exact same thing hoping that it was drivers or the motherboard or something. I do not have another pci-e video card to test or have anyone to borrow one from.

My hardware is:
am2 2800+ sempron
m2n sli deluxe
(msi k9n second test motherboard)
2x512mb xms ddr2 800
saphire x1950pro
wd800jb
wd2500jd
FSP 450watt PS

I rma'd the first video card since it worked fine one day but only one day hoping that it was the problem. But the second one does the same thing. I've also disabled everything in the bios that is not necessary to avoid device conflicts including sound, parallel port, serial ports, firewire, and ethernet ports. Any help would be awesome.

 

[FiZ]

When you switched motherboards (or installed the new equipment) did you reinstall Windows?

Also have you tried booting in Safe Mode (hit F8 during boot)?

 

[adc1986]

Yes, i reinstalled windows xp sp2 about 7-8 times now between the two boards. I tried 3 different sets of drivers for the video card drivers. Today I tried the video card in a friend's box and the video card worked great. I tried reinstalling windows again and installing most of the KB updates from microsoft and installing the .net 2.0 framework that is required for the CCC, but no luck. I even tried a different power supply too. Anyone got any ideas? Are there any omega drivers available for the x1950pro yet?

 

[Blown 89]

Subscribing. I have the same problem. I log in an the computer reboots. It works in safe mode and works when I unistall my Nvidia drivers. I built a completely new computer because my last one was having this problem and now, out of the blue, I'm having the same issue. The computer also freezes in the middle of games requiring a reboot. I'm water cooled so heat is not an issue.